Cab off, now Trailer Brake Module Fault?

[CT9AIX]

No problems with the brake controller since I've owned the truck, took the cab off, put all back together and can't figure this stupid thing out? Everytime I start the truck the message center flashes the module fault and I need to clear it and there are no other issues. I double checked all plugs I took apart and everything is back together, and everything else with truck is running perfect? Only thing I haven't done is check related fuses, which hopefully I'll have time this weekend to do so.... Anyone have any other ideas? Got me stumped. Thanks

 

[dohcter]

Check the frame connectors, I've had them look connected but be separated just enough to not make connection. Little lube and a squeeze with a pair of pliers seem to work. Also check the codes, could also just be a controller going bad, or corrosion at the trailer plug

 

[CT9AIX]

I ended up double check the plugs like you had mentioned and one must have not be fully connected... Because were all good now. Thanks bud